Mackie M 1200 User manual

Brand: Mackie

Model: M 1200

Category: Audio amplifiers

Type: User manual

This manual is also suitable for

M1200
M1400

FEATURES

FAST RECOVERY SERIES HIGH CURRENT POWER AMPLIFIERS

M•1200/M•1400

ARCHITECTS &

ENGINEERS

SPECIFICATIONS

■

“IN YOUR FACE”

SOUND REINFORCEMENT

& RECORDING BROCHURE

MORE INFORMATION

■Fast Recovery design

for improved transient

response and recovery

from clipping

■Rack-mountable (2U)

with rear support rails

for extra support

■Separate left and right

detented gain controls,

calibrated in both dB

and volts

■Balanced XLR and 1/4"

TRS input jacks

■Balanced XLR thru jacks

■Heavy-duty binding post

output jacks in parallel

with:

M•1200 —

1/4" TS output jacks

M•1400 —

Speakon® output jacks

■6 LED metering includ-

ing Signal Present and

Overload

■Separate L/R Protect

LEDs indicate the

following protection

conditions:

1) Automatic turn-on

delay to prevent poten-

tially damaging thumps

and pops from reaching

your speakers

2) Short-circuit protect

with separate L/R

indicating LEDs

3) Thermal protect with

combined Ch1 and 2 Cold

and Hot indicating LEDs

■SCR Crowbar DC offset

protect

■Low-cut filter with

variable frequency

control (Off – 170Hz)

■Subsonic stabilization

eliminates ultra-low-

frequency noise caused

by microphone han-

dling, stage rumble

■Constant directivity horn

compensation with

variable high-frequency

boost control (2kHz to

6kHz)

■Amp Mode switch for

Stereo, Mono, or Bridge

modes

■Limiter to eliminate

clipping in both channels

■Subwoofer mode switch

with dual-frequency select

(63Hz/125Hz)

■T-Design Constant

Gradient Cooling Tunnel

uses two short tunnels

instead of one long

tunnel for improved

cooling efficiency and

output device reliability

■Dual-speed cooling fan

■Toroidal transformer for

reduced EMI emissions

The world is full of amplifiers

that do one thing – amplify

audio signals. But at Mackie

Designs, we’ve always put

out the extra effort to provide

more quality and more

features than our competitors

while maintaining a com-

parable (or lower) price.

The FR Series™ power

amplifiers are designed to

perform reliably under the

most adverse conditions,

and we’ve added a bundle

of extra features, so you

don’t have to put out the

extra bucks to buy a bunch

of add-ons or plug-ins to

make your sound system

do what you want it to do.

Meticulous Detail

Perhaps the most impor-

tant aspect of the FR Series

amplifiers is the attention

to detail in the design of

the electronic architecture.

We have incorporated a

number of unique properties

including Fast Recovery,

sustained high-current output

capability, high voltage and

current slew rate, and defeat-

able clipping eliminator, to

ensure that the output of

the amplifier is virtually

distortion-free.

What is Fast Recovery?

Fast Recovery refers to the

amplifier’s ability to recover

after being over-driven into

clipping. Most amplifiers’

output circuits tend to stay

“latched” in the clipping

mode, making their recovery

time relatively slow, especially

at high frequencies. Our FR

Series amplifiers incorporate

two unique circuit designs

that completely eliminate

the latching phenomena.

The first is a Baker Clamp

diode configuration, and the

second is the use of two

additional supplies that are

at a higher voltage than the

main supplies. Without get-

ting too technical, the result

is no latching and instant

recovery from overdrive.

Durability. A word

Mackie lives by.

Mackie mixers are well-

known for their ability to

withstand the abuses of the

road. Most of Mackie Designs’

employees have experience

as musicians, roadies, or

sound engineers in the real

world of music entertainment

and live sound reinforcement.

We know what kind of

punishment sound equip-

ment can be subjected to,

and our engineers know

how to design equipment

that can take it.

Pro features even

amateurs can understand.

Mackie’s FR Series power

amplifiers were designed

with professionals – and

amateurs – in mind. These

amplifiers are great for live

sound reinforcement applica-

tions as well as studio or

broadcast control rooms.

With the ability to deliver

massive amounts of current

instantly, the FR Series amp-

lifiers can handle power-

sucking subwoofers, yet

remain discriminating and

responsive when driving a

bank of delicate tweeters.

Power Output.

The M•1200 is rated at

225 watts per channel into

8Ω, 400 watts per channel

into 4Ω and 600 watts per

channel into 2Ω. In bridge

mode the M•1200 is rated

at 800 watts into 8Ω and

1200 watts into 4Ω.

The M•1400 is rated at

250 watts per channel into

8Ω, 425 watts per channel

into 4Ω and 630 watts per

channel into 2Ω. In bridge

mode the M•1400 is rated

at 850 watts into 8Ω, and

1260 watts into 4Ω.

Sustained ultra-low

impedance capability.

The FR Series power amp-

lifiers are designed to drive

low impedance loads effort-

lessly and reliably. Most power

amplifiers have difficulty

driving anything lower than

4 ohms, but the FR Series

power amplifiers can easily

drive 2 ohm loads all day

long without breaking a sweat.

This is a result of the careful

and efficient design of the

heatsink and cooling tunnels,

which keep the output devices

running as cool as possible,

along with the virtual elimi-

nation of VI limiters, which

can cause lesser amplifiers

to distort or to shut down

completely when driving

low impedance loads.

Inputs, Input Level Controls

and Metering.

The FR Series amplifiers

are equipped with balanced,

line-level input connectors

for each channel in the form

of XLR female jacks and 1/4"

TRS phone jacks. In addition,

XLR male jacks are provided

as thru connections for daisy-

chaining the input signal to

multiple amplifiers. The XLR

male thru jack is in parallel

with the XLR female jack

and the 1/4" TRS jack, and

any one can be used as an

input or thru connector.

Each channel

has an inde-

pendent gain

control with

40 detents for

accurately

setting and

matching the

gain between

channels. The

gain controls

are calibrated

in dB (from

off to 30) and

in volts (with

indications of

1V, 2V, and 3V).

Six discrete

LEDs are used

to indicate signal level for

each channel, including a

signal present LED, indicators

at –20, –9, –6, and –3dB

below full power, and an

overload LED to indicate

when the output has reached

the clipping point.

Outputs.

The M•1200 and M•1400

differ in their output con-

nector configurations. They

both come with heavy-duty

5-way binding posts, which

can accept standard double

banana plugs, spade lugs, or

bare wire (Export versions

will not accept banana plugs

due to European safety

requirements). The M•1200

also has 1/4" TS phone jack

outputs in parallel with the

binding posts. The M•1400

comes with Neutrik brand

Speakon® connectors in par-

allel with the binding posts.

Stereo, Mono and Bridge

modes.

The amplifiers can be oper-

ated in one of three modes.

In stereo mode, the amplifier

operates with two inputs and

two outputs. It accepts sepa-

rate channel 1 and 2 input

signals, and outputs separate

channel 1 and 2 signals.

In mono mode, the ampli-

fier operates with one input

and two identical outputs. It

accepts an input signal through

channel 1, and outputs the

same signal at both channel

1 and 2 speaker outputs.

In bridge mode, the ampli-

fier operates with one input

and one output. It accepts an

input signal through channel

1, and combines the power

of both output sections into

a single output, using the

channel 1 positive and

channel 2 positive speaker

output terminals.

Clipping eliminator.

Mackie Designs power

amplifiers use a method of

protecting the amplifier and

the speakers from clipping

that doesn’t affect the low

impedance capablility of the

amplifier. A defeatable limiter

circuit is em-

ployed that

reduces the

input signal

when the out-

put of the

amplifier ap-

proaches the

clipping point.

The moment the output

level drops below clipping,

the limiter turns off and is

effectively “out-of-circuit,”

so it doesn’t

degrade the

audio signal in

any way.

T-Design

Constant

Gradient

Cooling

Tunnel.

Most amplifi-

ers have a fan

in the back that

blows air (along

with dust and

other contami-

nants) into the

inside of the

amplifier, across

the heatsinks

as well as all the other inter-

nal components, and finally

out through the front.

These designs are cheap to

implement, but not very

efficient.

Others use a cooling tun-

nel with the fan at one end.

The problem with this design

is that the heat from the

first transistors warms the

air so that by the time the

air reaches the end of the

tunnel it’s too hot to provide

sufficient cooling.

Our T-Design Constant

Gradient Cooling Tunnel

offers a much more efficient

method of providing cool

air to all the transistors with-

out blowing contaminants

all over its insides. A dual-

speed fan is located in the

center of the amplifier, direct-

ing air from the front of the

amplifier

through a

large intake

manifold into

the cooling

tunnel. The

cool air is

evenly dis-

tributed

from the middle of the tun-

nel to each end, where the

warm air then exits the

amplifier on either side.

Cooling tunnel airflow

Block Diagram

M•1200/M•1400

DIMENSIONS

CH 1

BALANCED

LINE INPUT

(TRS)

CH 1

BALANCED

LINE INPUT

(XLR-F)

LIMITER

OFF

LOW CUT

FILTER

LOW PASS

FILTER

(SUBWOOFER)

–80 VDC +

–90 VDC

TOROIDAL POWER

TRANSFORMER

LAMP

INTERNAL

FUSE

MACKIE DESIGNS

M•1200/M•1400

BLOCK DIAGRAM

(#011497DF)

FREQ

CD EQ

FREQ OUTPUT

APPLICATION

SWITCH

AMP

MODE

SWITCH

63 Hz

125 Hz

FREQ TO

LIMITER

OFF

LOW CUT

FILTER

FREQ

CD EQ

FREQ

CH 1

GAIN

STEREO

MONO

BRIDGE

CH 2

GAIN

INVERTING

UNITY GAIN

AMPLIFIER

OFF

SUB

OFF

SUB

NC NC

MUTE

CH 1

PROTECT

LED

CH 1

SHORT

LED

MUTE

CH 2

PROTECT

LED

POWER

AMPLIFIER

CH 1

SPEAKER

OUT

FUSE

–80VDC

FUSE

+80VDC

DC OFFSET

DETECT

SHORT

DETECT METER

DRIVE

POWER

AMPLIFIER

CH 2

SPEAKER

OUT

FUSE

–80VDC

FUSE

+80VDC

DC OFFSET

DETECT

TO CH 1

MUTE OL

–3

–6

–9

–20

SIG

CH 1

SIG

CH 2

SHORT

LED

SHORT

DETECT METER

DRIVE

TO CH 2

MUTE OL

–3

–6

–9

–20

SIG

CH 2

SIG

(TO CH 1

METER DRIVE)

SIG

(TO CH 2

METER DRIVE) PD's LEASH

HOT

LED

COLD

LED

TEMP

SENSOR

(ON HEATSINK)

TO CH 1

AND CH 2

MUTE

CH 1 AMP OUT

CH 2 AMP OUT

CH 1 MUTE

CH 2 MUTE

60ºC

DETECTOR FAN

SPEED

CONTROL

HI DCV

LO DCV

CH 1

MUTE

CH 2

MUTE

POWER

SWITCH

TO CH 1

AND CH 2

MUTE THERMAL

PROTECT

THRU

(XLR-M)

CH 2

BALANCED

LINE INPUT

(TRS)

CH 2

BALANCED

LINE INPUT

(XLR-F)

THRU

(XLR-M)

80ºC MUTE

55ºC UNMUTE

FAN

TO HUSKY

STADIUM

1/4" TS JACK

M•1200 only

1/4" TS JACK

M•1200 only

–3

–6

–9

–20

–3

–6

–9

–20

SIG

20 22

2416

1.23v (+4dBu)

SENSITIVITY

GAIN/dB CH

PROTECT

COLD HOT

SHORT

TEMP STATUS

INTERNAL STATUS

1&2

OFF

POWER

20 22

2416

1.23v (+4dBu)

SENSITIVITY

GAIN/dB

PROFESSIONAL POWER AMPLIFIER

FULL SYMMETRY DUAL DIFFERENTIAL HIGH CURREN T DESIGN

19.00" (48.3cm)

17.25" (43.8cm)

15.25" (38.7cm)

3.50"

(8.9cm)

16.25" (41.3cm)

M•1200/1400

WEIGHT

36 lbs.

(16.3 kg)

1.25"

(3.2cm)

Built-in subwoofer crossover.

The amplifier has a sub-

woofer mode that allows you

to turn on the built-in sub-

woofer crossover. When

activated, the signals appear-

ing at the left and right inputs

are summed, directed to a

low-pass filter, and routed

to both output stages. A

switch selects the cutoff fre-

quency of the filter at either

63Hz or 125Hz, and the ampli-

fier can be set to either mono

or bridge mode of operation.

Built-in constant directivity

horn compensation.

When a compression driver

is attached to a constant

directivity (CD) horn, it requires

a certain amount of high-

frequency boost to compen-

sate for the natural roll-off

inherent in all compression

drivers. Some speaker manu-

facturers provide external

processors with plug-in

modules for each of the

various combinations of

horns and drivers (at an

additional cost to you!) to

compensate the CD horns.

Each channel of an FR

Series power amplifier has

its own built-in CD horn

compensation circuit. All you

need to do is set the variable-

frequency horn EQ control on

the amplifier to the manu-

facturer’s recommended mass

breakpoint frequency (the

point where the frequency

response begins to roll off).

As an added feature, if you’re

not using CD horns, set the

frequency control fully clock-

wise to the AIR setting to en-

joy Mackie’s exclusive AIR

EQ, a gentle high-frequency

boost that brightens and

lightens the sound.

Low-cut filter.

Virtually all loudspeakers

have a low-frequency cutoff

point somewhere above

20Hz. Many low-frequency

drivers have a –3dB point

at 35Hz to 40Hz, while many

stage monitor speakers cut

off at about 100Hz; there’s

no sense in amplifying low-

frequency signals that the

loudspeaker cannot reproduce.

Each channel of the FR

Series amplifiers has a con-

tinuously variable low-cut

filter. Simply dial in the fre-

quency at which the loud-

speakers drop off (anywhere

from OFF to 170Hz), and

reap the benefits of saving

amplifier power with

cleaner, tighter bass.

Built-in subsonic stabilizer.

Even with the low-cut

filter set to the OFF position,

each channel of the FR Series

amplifiers has a built-in

subsonic stabilizer (technically

called infrasonic stabilizer).

This dampens the very low

frequencies, which can be

caused by microphone

handling or stage rumble.

These frequencies are below

the threshold of human

hearing, and rob the amplifier

of power and contribute to

intermodulation distortion.

Protection circuits.

Both amplifiers are

equipped with a number of

unique and innovative protec-

tion circuits to ensure the

safety of your speakers and

the amplifiers.

Separate left and right

Protect LEDs on the front

panel indicate when a protec-

tion circuit has been activated.

For example, when the am-

plifier is first turned on the

outputs are muted for three

seconds, during which time

the Protect LEDs are lit. This

allows time for all the equip-

ment in the system to power

up and stabilize, and prevents

potentially damaging thumps

or pops from propagating

to the speakers.

Separate left and right

Short LEDs indicate if there

is a short circuit at the

speaker output terminals.

This lets you know at a glance

to check the speaker wiring

for shorts (or recalculate the

speaker load impedance)

right from the get-go, so you

don’t waste precious time

searching for the problem.

Combined left and right

Cold and Hot LEDs indicate

if the amplifier has overheated.

Under normal operation,

the Cold LED remains lit. If

the Hot LED should light,

the outputs become muted

until the amplifier cools to

a safe operating temperature,

then normal operation ensues.

The FR Series: The most

affordable, full-featured

power amplifiers available.

As you can see, there is

every reason the M•1200

and M•1400 are fast becoming

the premier affordable choice

for many sound reinforcement

and recording applications.

With their proven durability,

professional features and

specs, and certainly not least,

low cost – the FR Series is

destined to be a classic.

There are no other power

amplifiers in their class with

all these features at such

an affordable price.

And that’s why people

from all professions, with

all kinds of different applica-

tions, prefer Mackie’s FR Series.

You’ll like them because of

their low price, easy-to-use

features, and rugged construc-

tion. That’s got to sound good.

And, of course, Mackie does.

MACKIE DESIGNS INC.

16220 Wood-Red Rd. NE , Woodinville • WA • 98072 • USA

Toll-Free 800/258-6883 • FAX 425/487-4337 •

E-mail: [email protected] • www.mackie.com

For distribution information outside the USA,

425/487-4333 • FAX 425/485-1152

Mackie Designs Inc. is engaged in a continuous

program of product evaluation and improvement

and reserves the right to change product

specifications at any time without notice.

The following are trademarks or registered

trademarks of Mackie Designs Inc.: “Mackie.”,

the Running Man, and FR Series.

Speakon is a registered trademark of Neutrik.

Part No. 091-096-00 Rev. B 2/98

Reserved.

Frequency Response:

20Hz to 40kHz (+0, –1dB)

10Hz to 70kHz (+0, –3dB)

Distortion:

THD, SMPTE IMD, TIM

< 0.025%@8Ω

< 0.050%@4Ω

< 0.150%@2Ω

Signal to Noise Ratio:

> 107dB below rated

power into 4 ohms

Channel Separation:

> 80dB@1kHz

Damping Factor:

> 350 from 0 to 400Hz

Input Impedance:

20kΩ balanced bridging

Input Sensitivity:

1.23 volts (+4dBu) for rated

power into 4 ohms

Gain:

30.25dB (32.5V/V)

Maximum Input Level:

9.75 volts (+22dBu)

Rise Time: < 4.4µs

Slew Rate:

Voltage Slew Rate > 50V/µs

> 100V/µs bridged

Current Slew Rate> 32A/µs at 2Ω

CMRR: > 40dB, 20Hz to 20kHz

Transient Recovery:

< 1µs for 20dB overdrive @ 1kHz

High Frequency Overload and

Latching:

No latch up at any frequency or

level

Variable Low-Cut Filter:

10Hz (Off) to 170Hz,

2nd Order Bessel

Subwoofer Low-Pass Filter:

Switched: 63Hz/125Hz,

3rd Order Bessel

Constant Directivity High

Frequency Boost:

2kHz to 6kHz (+3dB points)

6dB/octave high-frequency

shelving filter, (shelving occurs at

approximately 30kHz)

Turn On Delay:

3 seconds

Limiter Section:

Complementary Positive and

Negative Peak Detecting

Indicators:

Six meter LEDs per channel

SIG (Signal Present),

–20, –9, –6, –3, OL (Overload)

CH 1 & 2

PROTECT LEDs

SHORT LEDs

TEMP STATUS

COLD, HOT LEDs

Power Consumption:

M•1200 120V 240V

65 watts at idle 0.9A 0.5A

500 watts with musical program

fully loaded 6.4A 3.2A

(4Ω per side, or 8Ω bridged)

850 watts with musical program

fully loaded 10.0A 5.0A

(2Ω per side, or 4Ω bridged)

800 watts at full power into 8Ω

(cont. sine wave) 9.3A 4.7A

1400 watts at full power into 4Ω

(cont. sine wave) 15.0A 7.5A

2400 watts at full power into 2Ω

(cont. sine wave) 24.3A 12.2A

M•1400 120V 240V

65 watts at idle 0.9A 0.5A

550 watts with musical program

fully loaded 6.7A 3.4A

(4Ω per side, or 8Ω bridged)

900 watts with musical program

fully loaded 10.5A 5.3A

(2Ω per side, or 4Ω bridged)

850 watts at full power into 8Ω

(cont. sine wave) 9.6A 4.8A

1500 watts at full power into 4Ω

(cont. sine wave) 15.6A 7.8A

2500 watts at full power into 2Ω

(cont. sine wave) 24.8A 12.4A

AC Line Power:

US 120VAC, 60Hz

Europe 240VAC, 50/60Hz

Japan 100VAC, 50/60Hz

Korea 220VAC, 60Hz

AC Drop-out Voltage:

At approximately 50% of rated

line voltage

Physical:

Height: 2U = 3.5" (89mm)

Width: 19.0" (483mm)

Depth: 15.25" (387mm)

Handle Depth: 1.25" (32mm)

Overall Depth: 16.25" (413mm)

Weight: 36 lbs (16.3kg)

SPECIFICATIONS

Continuous Average Output

Power, both channels driven:

M•1200

225 watts per channel into

8 ohms from 20Hz to 20kHz, with

no more than 0.025% THD

400 watts per channel into

4 ohms from 20Hz to 20kHz, with

no more than 0.050% THD

600 watts per channel into

2 ohms from 20Hz to 20kHz, with

no more than 0.095% THD

Bridged mono operation:

800 watts into 8 ohms from 20Hz

to 20kHz, with no more than

0.05% THD

1200 watts into 4 ohms from

20Hz to 20kHz, with no more

than 0.095% THD

Maximum Power at 1% THD (per

IHF-A-202):

250 watts per channel into 8Ω

425 watts per channel into 4Ω

640 watts per channel into 2Ω

850 watts into 8Ω bridged

1280 watts into 4Ω bridged

M•1400

250 watts per channel into

8 ohms from 20Hz to 20kHz, with

no more than 0.012% THD

425 watts per channel into

4 ohms from 20Hz to 20kHz, with

no more than 0.025% THD

630 watts per channel into

2 ohms from 20Hz to 20kHz, with

no more than 0.050% THD

Bridged mono operation:

850 watts into 8 ohms from 20Hz

to 20kHz, with no more than

0.025% THD

1260 watts into 4 ohms from

20Hz to 20kHz, with no more

than 0.050% THD

Maximum Power at 1% THD (per

IHF-A-202):

280 watts per channel into 8Ω

480 watts per channel into 4Ω

700 watts per channel into 2Ω

960 watts into 8Ω bridged

1400 watts into 4Ω bridged

Note: Power ratings are specified

at 120VAC (U.S. and Canada) and

240VAC (Export) line voltages.

Power Bandwidth:

20Hz to 70kHz (+0, –3dB)

Mackie M 1200 User manual

Brand: Mackie

Model: M 1200

Category: Audio amplifiers

Type: User manual

This manual is also suitable for

M1200
M1400

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Mackie M 1200 User manual

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